Mark wilder



R N m me A M L IG Wm m R H T Patented Jan. 1, 1867.

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MARK WILDER, OF EAST PRINCETON, MASSACHUSETTS.

* Letters Patent No. 60,813, dated January 1, 1867.

IMPROVEMENT IN .THRESHING MACHINES.

TO ALL WHOM IT MAY" oonennn:

i, I Be it known that I, MARKWILDER, of East Princeton, in the county ofWorcester, and Commonwealth of Massachusetts, have invented certain newand useful improvements in Threshing Machines and Dust Removers; and Ido hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this specification, in which Figure 1represents a'perspective view of my said improved machine. Figare 2represents a longitudinal central section; and v Figure 3 represents across-section on line A B, fig. 2, looking in the direction of arrow 5,fig 1. The object of myinvention is to relieve the men who work aboutthe machine from the inconvenience and f injury resulting from workingin the dust occasioned by the threshing operation; also, to obtain amoreperfect separation of both grain and dust from the straw and from eachother. R In the drawings, A A A A represent a strong frame, in which aresupported, in proper hearings or boxes, the shafts of the threshingoylinder'B and fans C and D. The sides and top of the machine areclosed, as nearly air and dust-tight as practicable, while the front isclosed, except at the place where the unthreshcd grain is fed in. Therear of the machine is also closed in the same manner, except attheplaces where the straw and dust 'are discharged, as will be hereafterexplained. The sides of the machine are providedwithdoors as i di,"dated in fig. 1', which can' be opened to examine the operation orrepair the machine whenever desired. Earl C works in a case, G whichopens at each end into the box'E, and is open'at the bottom, as shown ata. Fan D also works in a case, F, arranged within the closed sides ofthe machine. Case F is open at each end, and consequently the air anddust within the closed sides of the machine will be drawn in and forcedout of the case F whenever the machine is in operation, the air and dustpassing out of the spout or vent-way G. H is the stationarythreshing-bed, and for the convenience of repairs, or for cleaning ofeither the bed or cylinder B, the bed is fastened to and supported ateach end by pieces I, one of which is shown in fig. 2. Pieces I arehinged r at their lower ends, as indicated at 6, so that when the hingedstandards J are turned forward, the bed H can be lowered. K istheseparating board or frame, having holes, 0, for the grain to passthrough, and long notched strips, L, to support the straw and work italong to the rear of the machine. The separating frame K supported in aninclined position by hinged arms, M, two upon each side. When themachine is in operation, frame K is moved back and forth by means of armN, which is fastened to frame K, and is also connected to crank 01, onthe end of shaft 2, which is operated by beltf, which runs upon pulley9. O is a lattice frame, which is suspended at front by straps, it, oneof which is seen in the drawings. This frame, 0, is supported in therear by cords or chains, 1', which are attached to a shaft, is, by meansof which the rear of frame 0 can be raised or lowered whenever desired.The operation of the machine is as follows: Motion being impatred to thethreshing cylinder B and fans 0 and D in any proper manner, the grain tobe thrcshed is placed upon table P, from which it is fed to cylinder Bin the ordinary manner. As fan C turns in the same direction as cylinderB, the straw is prevented from being carried back over cylinder B by thestrong current of air which is forced by fan 0 through the opening a incase 0 against the teeth m, and consequently my machine is not liable toclog up. Again, as the air to supply the fan C is drawn from box E,which. is open only at the lower front corner, nearly all the dust,which would otherwise escape into the air infront of the cylinder, isdrawn into box E,,through the opening n, which is covered byguard-wires, 0, attached to frame to prevent the straw from table Pbeing drawn into box E and fan 0. Frame]; rests in the bent supports, g,from which it can be removed at pleasure. The straw is thrown back, bythe combined action of cylinder B and fan C, in a very loose condition,against the lattice frame 0, before it falls upon the separating frameK, and which operation conduces very much to the perfect separation ofthe grain from the straw and dust. As the straw is worked back by theaction of the frame K, to be discharged therefrom at the rear, fan Ddraws a strong current of air through the same, which cleans it fromdust. The action of fan D is such, too, as to cause a current of air topass up through the holes in frame K, whereby the grain is allowed tofall upon the gathering boards, Q, free from floating dust. It will thusbe seen, that by the action of fans C and D a partial vacuum' is createdwithin the case of the machine, whereby currents of air are passing inthrough every hole and crevice, thus preventing the escape of dust fromthe machine except through the spout or Vent G, which may be extendedsnfliciently far from the machine to discharge the dust or dirt out ofthe way of the workmen engaged in operating the machine. Frame 0, whileit arrests the straw, and prevents it from being thrown or drawn uparound the ends of the fan-case F, readily yields sufficiently toprevent the'straw from clogging up in the machine. In some machines thethreshing cylinder turns in an opposite direction from that abovedescribed and shown in the drawings. In such cases the fanC would haveto be placed below the cylinder, unless wind chests were used to conveythe air to the proper position to act as described. Fan D may also bedifferently arranged, and still accomplish the same results; forinstance, it might be placed on top of the machine, provided thearrangement was such that the fan would cirhaust the air from themachine, and thus draw off the dust and dirt. The top, front, and endsof box E are so made that they can be quickly removed, together with fanC and the parts connected therewith, for the purpose of repairing themachine. The action of fan 0, by forcing a strong current of air againstthe teeth m, and surface of the threshing cylinder B, forces the flyingdust back into the machine, and prevents its escape into theair in frontof the machine. It is an adjustable damper, by means of which theopening at the rear of the machine can be enlarged or contracted, toregulate the current of air drawn in by fan D.

Having described my improved threshing machine and dust remover, what Iclaim therein as new, and of my invention, and desire to secure byLetters Patent, is- I 1. The combination of fan D with the separatingparts of the machine, substantially as and for the purposes stated.

2. The combination of fan C with the threshing parts of the machine,substantially as and for the purposes stated.

3. The combination and arrangement of fans G and D with cylinder 13,substantially as set forth.

4. The combination and arrangement of fans C and D. and threshingcylinder 13, with frames 0 andK, as and for the purposes set forth.

5. The combination withthe front of box E of the guards 0 and adjustableframe 1), substantially as and for the purposes set forth.

6. Supporting bed-piece, H, by means of hinged supports I and J, for thepurposes stated.

7. The combination of theedjustable damper E with the fan D,substantially as and for the purposes set forth.

MARK WILDER.

Witnesses:

Tnos. H. Dones, D. L. M tten.

